Discontinuous reception (DRX) extended-on and dynamic transmission patterns in sidelink

Abstract

Wireless communications systems and methods related to discontinuous reception (DRX) extended-on operations and dynamic transmission patterns in sidelink are provided. A first user equipment (UE) determines a transmission pattern for a first sidelink based on an extended DRX on-duration associated with a second sidelink different from the first sidelink, wherein the first sidelink is between the first UE and a second UE, and wherein the second sidelink is between the second UE and a third UE. The first UE transmits, to the second UE over the first sidelink during the extended DRX on-duration based on the transmission pattern, a communication signal.

What is claimed is: 
     
       1. A method of wireless communication performed by a first user equipment (UE), the method comprising:
 determining an extended discontinuous reception (DRX) on-duration based on at least one of a DRX-hybrid automatic repeat request round-trip-time (DRX-HARQ RTT) timer value or a DRX-retransmission timer value; 
 determining a transmission pattern for a first sidelink based on the extended DRX on-duration associated with a second sidelink different from the first sidelink, wherein the first sidelink is between the first UE and a second UE, and wherein the second sidelink is between the second UE and a third UE; 
 transmitting, to the second UE over the first sidelink during the extended DRX on-duration based on the transmission pattern, a communication signal; and 
 monitoring, in a physical sidelink feedback channel (PSFCH) resource pool associated with the second sidelink, for an acknowledgement/negative-acknowledgement (ACK/NACK) indication for data associated with the SCI. 
 
     
     
       2. The method of  claim 1 , wherein:
 the extended DRX on-duration is extended from an on-duration of a DRX cycle associated with the second sidelink; and 
 the transmitting the communication signal comprises: 
 transmitting, during a period outside of an on-duration of a DRX cycle associated with the first sidelink, the communication signal. 
 
     
     
       3. The method of  claim 1 , further comprising:
 monitoring for sidelink control information (SCI) associated with the second sidelink; and 
 determining, in response to detecting the SCI from the monitoring, the extended DRX on-duration for the second sidelink. 
 
     
     
       4. The method of  claim 3 , wherein:
 the SCI indicates one or more sidelink reservations; and 
 the determining the extended DRX on-duration for the second sidelink comprises: 
 determining the extended DRX on-duration based on a time resource reserved by a next sidelink reservation of the one or more sidelink reservations. 
 
     
     
       5. The method of  claim 3 , wherein:
 the SCI indicates one or more sidelink reservations; and 
 the determining the extended DRX on-duration for the second sidelink comprises: 
 determining the extended DRX on-duration based on at least one of a time resource reserved by a last sidelink reservation of the one or more sidelink reservations or a time offset from the time resource. 
 
     
     
       6. The method of  claim 3 , wherein:
 the SCI indicates one or more sidelink reservations; and 
 the determining the extended DRX on-duration for the second sidelink comprises: 
 determining the extended DRX on-duration based on at least one of a physical sidelink feedback channel (PSFCH) resource associated with a last sidelink reservation of the one or more sidelink reservations or a time offset from the PSFCH resource. 
 
     
     
       7. The method of  claim 3 , further comprising:
 receiving, from the second UE over the first sidelink, a DRX-inactivity timer configuration associated with the second sidelink, 
 wherein the determining the extended DRX on-duration is further based on the DRX-inactivity timer configuration. 
 
     
     
       8. The method of  claim 3 ,
 wherein the determining the extended DRX on-duration is further based on the monitoring for the ACK/NACK indication. 
 
     
     
       9. The method of  claim 8 , wherein the determining the extended DRX on-duration:
 is in response to detecting a NACK indication from the monitoring for the ACK/NACK indication. 
 
     
     
       10. The method of  claim 8 , wherein the determining the extended DRX on-duration further comprises:
 adjusting, in response to failing to receive the ACK/NACK indication for the data from the monitoring for the ACK/NACK indication, the extended DRX on-duration. 
 
     
     
       11. The method of  claim 8 , further comprising:
 receiving, from the second UE over the first sidelink, a configuration for the PSFCH resource pool associated with the second sidelink. 
 
     
     
       12. The method of  claim 1 , wherein the determining the transmission pattern is further based on an extended DRX on-duration threshold. 
     
     
       13. The method of  claim 1 , further comprising:
 receiving, from the second UE over the first sidelink, at least one of timing information, a transmitter identifier (ID), or a DRX pattern associated with the extended DRX on-duration. 
 
     
     
       14. A method of wireless communication performed by a first user equipment (UE), the method comprising:
 receiving, from a second UE over a first sidelink, a first communication signal; and 
 receiving, from a third UE over a second sidelink during an extended DRX on-duration associated with the first sidelink, a second communication signal, wherein the second sidelink is different from the first sidelink, and wherein the extended DRX on-duration is based on the first communication signal, 
 wherein the first communication signal includes sidelink control information (SCI) and data, the SCI indicating a destination identifier (ID) truncated from a full destination ID and the data indicating the full destination ID. 
 
     
     
       15. The method of  claim 14 , wherein:
 the extended DRX on-duration is extended from an on-duration of a DRX cycle associated with the first sidelink based on the first communication signal; and 
 the receiving the second communication signal comprises: 
 receiving, during a period outside of an on-duration of a DRX cycle associated with the second sidelink, the second communication signal. 
 
     
     
       16. The method of  claim 14 , wherein the first communication signal comprises sidelink control information (SCI), and wherein the extended DRX on-duration is based on the SCI. 
     
     
       17. The method of  claim 16 , wherein the SCI indicates one or more sidelink reservations, and wherein the extended DRX on-duration is based on at least one of a time resource reserved by a next sidelink reservation of the one or more sidelink reservations or a predetermined DRX-inactivity timer value. 
     
     
       18. The method of  claim 16 , wherein the SCI indicates one or more sidelink reservations, and wherein the extended DRX on-duration is based on at least one of a time resource reserved by a last sidelink reservation of the one or more sidelink reservations or a time offset from the time resource. 
     
     
       19. The method of  claim 16 , wherein the SCI indicates one or more sidelink reservations, and wherein the extended DRX on-duration is based on at least one of a time location of a physical sidelink feedback channel (PSFCH) resource associated with a last sidelink reservation of the one or more sidelink reservations or a time offset from the PSFCH resource. 
     
     
       20. The method of  claim 14 , further comprising:
 transmitting, to the third UE over the second sidelink, a DRX-inactivity timer configuration associated with the first sidelink. 
 
     
     
       21. The method of  claim 14 , further comprising:
 transmitting, to the third UE over the second sidelink, a configuration for a PSFCH resource pool associated with the first sidelink. 
 
     
     
       22. The method of  claim 14 , further comprising:
 starting, in response to receiving the SCI, a DRX-inactivity timer; 
 refraining, based on the full destination ID failing to match a media access control (MAC) ID of the first UE, from transmitting an acknowledgement/negative-acknowledgement (ACK/NACK) indication for the first communication signal; and 
 resetting, based on the full destination ID failing to match the MAC ID of the first UE, the DRX-inactivity timer. 
 
     
     
       23. The method of  claim 14 , further comprising:
 determining the extended DRX on-duration for the first sidelink based on an extended DRX on-duration threshold. 
 
     
     
       24. The method of  claim 14 , further comprising:
 refraining from starting a DRX-inactivity timer based on receiving the second communication signal during the extended DRX on-duration associated with the first sidelink. 
 
     
     
       25. The method of  claim 14 , further comprising:
 transmitting, to the third UE over the second sidelink, at least one of timing information, a transmitter identifier (ID), or a DRX pattern associated with the extended DRX on-duration of the first sidelink. 
 
     
     
       26. A first user equipment (UE) comprising:
 a memory; 
 a transceiver; and 
 at least one processor coupled to the memory and the transceiver, wherein the memory stores instructions that are executable by the at least one processor, individually or in any combination, to cause the first UE to: 
 determine an extended discontinuous reception (DRX) on-duration based on at least one of a DRX-hybrid automatic repeat request round-trip-time (DRX-HARQ RTT) timer value or a DRX-retransmission timer value 
 determine a transmission pattern for a first sidelink based on the extended DRX on-duration associated with a second sidelink different from the first sidelink, wherein the first sidelink is between the first UE and a second UE, and wherein the second sidelink is between the second UE and a third UE; 
 transmit, via the transceiver to the second UE over first sidelink during the extended DRX on-duration based on the transmission pattern, a communication signal; and 
 monitor, in a physical sidelink feedback channel (PSFCH) resource pool associated with the second sidelink, for an acknowledgement/negative-acknowledgement (ACK/NACK) indication for data associated with the SCI. 
 
     
     
       27. The first UE of  claim 26 , wherein:
 the extended DRX on-duration is extended from an on-duration of a DRX cycle associated with the second sidelink; and 
 the at least one processor configured to transmit the communication signal is configured to: 
 transmit, during a period outside of an on-duration of a DRX cycle associated with the first sidelink, the communication signal. 
 
     
     
       28. The first UE of  claim 26 , wherein the at least one processor is further configured to:
 monitor for at least one of sidelink control information (SCI) or an acknowledgement/negative-acknowledgement (ACK/NACK) indication associated with the second sidelink; and 
 determine, in response to detecting the SCI from the monitoring, the extended DRX on-duration for the second sidelink. 
 
     
     
       29. A first user equipment (UE) comprising:
 a memory; 
 a transceiver; and 
 at least one processor coupled to the memory and the transceiver, wherein the memory stores instructions that are executable by the at least one processor, individually or in any combination, to cause the first UE to: 
 receive, via the transceiver from a second UE over first sidelink, a first communication signal; and 
 receive, via the transceiver from a third UE over a second sidelink during an extended DRX on-duration associated with the first sidelink, a second communication signal, wherein the second sidelink is different from the first sidelink, and wherein the extended DRX on-duration is based on the first communication signal, 
 wherein the first communication signal includes sidelink control information (SCI) and data, the SCI indicating a destination identifier (ID) truncated from a full destination ID and the data indicating the full destination ID. 
 
     
     
       30. The first UE of  claim 29 , wherein:
 the extended DRX on-duration is extended from an on-duration of a DRX cycle associated with the first sidelink based on the first communication signal; and 
 the at least one processor configured to receive the second communication signal is configured to: 
 receive, during a period outside of an on-duration of a DRX cycle associated with the second sidelink, the second communication signal.